***significant at the 1 percent level; **significant at the 5 percent level; *significant at the 10 percent level.

Standard errors in parenthesis. 131 observations. Data is missing for Delaware and Hawaii for all years; Alaska, North Dakota, Oregon, Utah, Vermont, and Washington D.C. in 2002; Alaska, Colorado, Hawaii, Minnesota, Oregon, Rhode Island, South Carolina, Tennessee, Utah in 2004 New Jersey and Arkansas are missing dental office visit data by income group for 2002 and Alaska for 2006.